Cisco Ios Versions

CISCO IOS VERSIONS

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IOS Nomenclature

Typical Release Lifecycle

First Customer Shipment (FCS) · The release is first available to Cisco customers on CCO EOS Notice · Notification of upcoming EOS End of Sale (EOS) · The release is no longer orderable or included in manufactured shipments End of Engineering (EOE) · The last day for software fixes; only TAC assistance is offered from this point End of Life (EOL) · The last day for TAC support; release becomes obsolete; upgrade is only option for support

IOS Filename

IOS Package Trees

Recommended IOS 800, 1700, 2600, 2800, 3700, 3800

12.4 / 12.4T

Catalyst 2960, 3560, 3750

12.2SE

Catalyst 4500 and 4900

12.2SG

Catalyst 6500

12.2SX

7200, 7301 routers

12.4 / 12.4T / 12.2SB

7304 routers

12.2SB

7500 routers

12.4 / 12.0S

10000 routers

12.2SB

7600 routers

12.2SR IOS Verification

Router# show version Router# dir : Router# verify :

by Jeremy Stretch

v1.1